The Hyper-Lydian Sequence




Not to be confused with the hyperlydian mode, the term hyper-lydian sequence is employed here to describe an imaginary sequence* of alternating major and minor thirds.

The name seems appropriate because the first six notes are identical to that of the Lydian arpeggio (C - E - G - B - D - F# - A) but, instead of resolving at C', the pattern of alternating thirds continues until the cycle is complete after seven octaves.




Larger illustration here

Breakdown
7 octaves
24 notes: 12 major thirds and 12 minor thirds apart.
12 major triads; all Lydian upper extensions available.
12 minor triads; all Dorian upper extensions available.
2 parallel cycles of perfect fifths.

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click here for pdf file

Characteristics
The sequence lends itself to harmonic progressions reminiscent of sixteenth century and more recent folk music forms but with one important difference: its potential to gradually slip into distant tonalities via stepwise progressions (see the triadic progressions pages below).

I doubt that Mclaughlin had this sequence in mind when he composed A Lotus on Irish Streams but, nonetheless, the tune stands as an excellent example of the harmonic colors available.

For the score to A Lotus on Irish Streams [J McLaughlin, 1971; Chinmoy Music, Inc (BMI); LP Columbia 31067] click here

download pdf file here

Triadic Progressions Explored
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*a "synthetic" arrangement of notes made practical through 12 tone equal temperament

Posted: Wed - November 19, 2008 at 10:41 PM          

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